Two days later, Simpson let fans know that she wasn't going to give up her search for the missing pooch.

"Still holding out hope despite the a–holes that say it is a dumb thing to do. Daisy is my baby… Why would I stop searching? I'm a mom," she tweeted. "I'm receiving every building block of faith I can get. Thank you."

Simpson finally accepted the news on September 18, 2009, after tracking dogs weren't able to pick up Daisy's scent.

"There just weren't any leads except one person who saw a pit bull with similar coloring," Colleen D. Busch of FindToto.com told UsMagazine.com at the time. "She felt like she had exhausted all her efforts and she wanted to come to peace with it."